Was the forecast right for Tampa on Mon Sep 21?
Tampa, Florida · daily high temperature in °C · forecasts from each model's archived runs, verified against the TPA observations
14 days out, 4 models put Tampa's Mon Sep 21 high anywhere from 30° to 34°;by the final call, the day before, the field had settled to a median of 32°. The day verified at 32° against the TPA observations, with 2.0 mm of precipitation — thunderstorms.
AIFS landed closest, off by 0.4°. GFS ran 2° warm.
What every model said, at every lead
Daily-high calls for Mon Sep 21 as each model's runs approached it — the last archived run per day. NBM and The Spread's own blend are consensus products and stay out of these ranges and rankings; the Tampa scoreboard shows them, labelled.
| Lead | AIFS | AIGFS | ECMWF | GEM | GFS | ICON | UKMO | Range |
|---|---|---|---|---|---|---|---|---|
| 15d · 2026-09-06 | — | 33° | — | — | 32° | — | — | 32–33° |
| 14d · 2026-09-07 | 30° | 32° | 31° | — | 34° | — | — | 30–34° |
| 13d · 2026-09-08 | 30° | 32° | 32° | — | 34° | — | — | 30–34° |
| 12d · 2026-09-09 | 30° | 25° | 29° | — | 31° | — | — | 25–31° |
| 11d · 2026-09-10 | 32° | 31° | 29° | — | 34° | — | — | 29–34° |
| 10d · 2026-09-11 | 30° | 33° | 33° | — | 33° | — | — | 30–33° |
| 9d · 2026-09-12 | 30° | 31° | 29° | 31° | 33° | — | — | 29–33° |
| 8d · 2026-09-13 | 32° | 32° | 33° | 33° | 34° | — | — | 32–34° |
| 7d · 2026-09-14 | 30° | 33° | 31° | 32° | 33° | — | — | 30–33° |
| 6d · 2026-09-15 | 29° | 32° | 30° | 31° | 33° | 33° | 32° | 29–33° |
| 5d · 2026-09-16 | 31° | 32° | 29° | 31° | 33° | 32° | 33° | 29–33° |
| 4d · 2026-09-17 | 31° | 32° | 30° | 31° | 34° | 32° | 30° | 30–34° |
| 3d · 2026-09-18 | 30° | 32° | 30° | 30° | 34° | 32° | 29° | 29–34° |
| 2d · 2026-09-19 | 31° | 32° | 31° | 32° | 34° | 32° | 31° | 31–34° |
| 1d · 2026-09-20 | 31° | 32° | 30° | 32° | 33° | 33° | 31° | 30–33° |
| actual | 32° |
Read it honestly
This is one date, not a league table. A model can win a day it deserved to lose; rankings only mean something over a window. For that, see which model has been most accurate in Tampa — or every city The Spread scores.
Forecasts are what each model's archived runs said at the time, captured at The Spread's sweep times — never reconstructed after the fact. Truth is the TPA observations. Archive depth varies by city; receipts exist only for dates the archive watched arrive.